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Conestoga River
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- 11948 Pennsylvania biologist's Conestoga river survey made pollution visible●In 1948, a Pennsylvania biologist made pollution visible by counting river life; her Conestoga survey bec
In 1948, a Pennsylvania biologist counted river life in the Conestoga to make pollution measurable, turning species surveys into evidence of water quality. The survey became a landmark in showing how biological data could reveal environmental damage that chemical tests alone missed.